The United States attacked three sites in Iran Sunday, inserting itself into Israel’s war aimed at destroying the Iranian nuclear program.

President Donald Trump said Saturday night that the U.S. had dropped bombs on three Iranian nuclear sites, the first time the U.S. has attacked Iran.

After nearly two years of stark divisions over the war in Gaza and support for Israel, Democrats seemed at odds over policy toward Iran as progressives demanded unified opposition before President Donald Trump announced U.S. strikes against Tehran’s nuclear program. Party leaders were treading more cautiously.